Pipe-bending machine



Sept. 30, 1924.

E. ROBINSON PiPE BENDING MACHINE Filed May 12. 1921 Patented dept. 39,195.24%.

UNITED STATESPATENT OFFICE.

EDWARD ROBINiSOh-T, 0F RQSELLE PARK,

NEW JERSEY, .ASEiIG-NOR TO THE TEXAS COMPANY, OF NEW YQBK, N. Y., A.CORPORATION OF TEXAS.

PIPE-BENDING MACHINE.

Application filed May 12,

T 0 all whom it WI/iY/j/ concern.

Be it known that I, EDWARD ROBINSON, a citizen of the United States, anda resident of Roselle Park, county of Union, and State of New Jersey,have invented certain new and useful Improvements in Pipe- BendingMachines. of which the following is a specification, reference being hadto the accompanying drawings. forming a part thereof.

My invention relates to machines for producing bends in metal pipes andit has for one object to provide a simple and iniproved device of thischaracter that shall be adapted to make not only 90 bends. but alsoreturn bends. :3 bends, and bends of any desired form, without damage tothe pipe.

(lther objects and advantages of my invention will be set forthhereinafter, and. I will now describe the same with reference to thedrawings and point out the novel features thereof in the appendedclaims.

Figure 1 is a plan view of a pipe bending device arranged andconstructed in accordance with my invention, and constituting oneembodiment thereof.

Fig. 2 is an elevation of the machine shown in Fig. 1, and

Fig. 3 is a sectional detail taken on the line of Fig. 1.

The machine illustrated in the drawings comprises a base plate 10 havinga pair of bending rolls 11 and 12 rotatively mounted on a pair of spacedstuds 13 and 1 1. The bending roller 11 performs the function of amovable guide which permits the pipe to freely move along withoutswinging as a whole. as it is being bent around the roller 12.

A bending block is secured between a pair of side plates 16 which.constitute a clevis and are mounted. on the stud 1 s with the roller 12interposed between them. The plates 16 are extended as shown in Figure 2to support a U-bolt clamp 1.7 and a handle lever 18 by which the bendingmachine may be operated.

The rollers 11 and 12.and the block are grooved to correspond in ageneral way to the curvature of the pipe although the machine is adaptedto be employed. for bending pipes of various sizes within the limitsimposed by the dimensions of the particular machine employed.-

1921. Serial No. 468,920.

it is of course evident that the machine may be built to any sizedesired but that any one machine cannot accommodate a pipe which is toolarge in size to be freely introduced between the side plates of thebending block.

The operation of the machine will be understood from the description ofits parts and need only be outlined as follows: To bend a piece of pipein the machine the same will be inserted as shown in Figure 1 and fixed.to the bending block by the U- bolt clamp 17. Before bending, it isdesirable that the pipe shall be filled with sand in order to preventbuckling.

The handle lever 18 is next swung from the full line position of Figure1 to the dotted line position. The pipe advances longitudinally and isfree to do so by reason of the motion of the roller 11 and is bentaround the roller 12, the bending block performing the function of aforming tool.

it is evident that the bend may be continued as far as desired and thatthere is nothing to prevent the formation of a return bend or U bend ina pipe, either near its end or at an intermediate point in its length.

t will also be seen that it is possible by the use of this machine tomake an S bend in the pipe either near its end or intermediate itslength and the machine may be put to various other uses.

Attention is particularly directed to the fact that my improved. machinehas great flexibility and can accomplish complicated and unusual bends.

,aipparatus of preferred form and construction has been illustrated anddescribed for the purpose of showing a way in which this invention maybe practiced v but the inventive thought upon which the application isbased is broader than this illustrative embodiment thereof and nolimitations are therefore intended other than those imposed by theappended claims.

lVhat I claim is:

l. A. pipe bending machine comprising a rotatably mounted bending rollerhaving a peripheral groove therein, a pair of spaced plates pivotallymounted coaxially with and on opposite sides of the bending roller, abending block secured between the spaced plates and spaced from thebending roller, means for securing one end of a pipe to be bent to thebending block between the block and the bending roller, a movable guidespaced from the bending block and bending roller for guidng theunsecured end of the pipe, and means secured between said plates formanually bending the pipe around the bending roller.

2. A pipe bending machine comprising a pair of pivotally mounted spacedbending rollers each provided With a peripheral conceve groove adaptedto receive a cylindrical shaped pipe, 3 pair of spaced side platespivotally mounted coaxially With and on opposite sides of one of thebending rollers a bending bloc-l; secured between the side plates :1spaced from one of the bending rollers, means for securing a pipe inposition between the two bending rollers and between one of the rollersand the bending block, and means for manually turning the bending blockto bend the pipe around one of the bending rollers.

In Witness whereof, I have hereunto set my hand this 4th day of Mary1921.

EDWARD ROBINSON. 11. 5.1

